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AD1934 データシート(PDF) 1 Page - Analog Devices |
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AD1934 データシート(HTML) 1 Page - Analog Devices |
1 / 28 page 8-Channel DAC with PLL, 192 kHz, 24 Bits AD1934 Rev. 0 Information furnished by Analog Devices is believed to be accurate and reliable. However, no responsibilityis assumedbyAnalogDevicesforitsuse,norforanyinfringements of patents or other rightsofthirdpartiesthatmayresultfromitsuse.Specificationssubjecttochangewithoutnotice.No license is granted by implication or otherwise under any patent or patent rights of Analog Devices. Trademarksandregisteredtrademarksarethepropertyoftheirrespectiveowners. One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A. Tel: 781.329.4700 www.analog.com Fax: 781.461.3113 ©2007 Analog Devices, Inc. All rights reserved. FEATURES PLL generated or direct master clock Low EMI design 108 dB DAC dynamic range and SNR −94 dB THD + N Single 3.3 V supply Tolerance for 5 V logic inputs Supports 24 bits and 8 kHz to 192 kHz sample rates Single-ended DAC output Log volume control with autoramp function SPI® controllable for flexibility Software-controllable clickless mute Software power-down Right-justified, left-justified, I2S and TDM modes Master and slave modes up to 16-channel in/out 48-lead LQFP APPLICATIONS Automotive audio systems Home theater systems Set-top boxes Digital audio effects processors GENERAL DESCRIPTION The AD1934 is a high performance, single-chip that provides eight digital-to-analog converters (DACs) with single-ended output using the Analog Devices, Inc. patented multibit sigma- delta (Σ-Δ) architecture. An SPI port is included, allowing a microcontroller to adjust volume and many other parameters. The AD1934 operates from 3.3 V digital and analog supplies. The AD1934 is available in a 48-lead (single-ended output) LQFP. Other members of this family include a differential DAC output and I2C® control port version. The AD1934 is designed for low EMI. This consideration is apparent in both the system and circuit design architectures. By using the on-board PLL to derive the master clock from the LR clock or from an external crystal, the AD1934 eliminates the need for a separate high frequency master clock and can also be used with a suppressed bit clock. The digital-to-analog converters are designed using the latest ADI continuous time architectures to further minimize EMI. By using 3.3 V supplies, power consumption is minimized, further reducing emissions. FUNCTIONAL BLOCK DIAGRAM SERIAL DATA PORT PRECISION VOLTAGE REFERENCE TIMING MANAGEMENT AND CONTROL (CLOCK AND PLL) CONTROL PORT I2C/SPI CONTROL DATA INPUT/OUTPUT AD1934 DIGITAL AUDIO INPUT/OUTPUT SDATAIN CLOCKS ANALOG AUDIO OUTPUTS 6.144MHz DAC DAC DAC DAC DAC DAC DAC DAC DIGITAL FILTER AND VOLUME CONTROL Figure 1. |
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同様の説明 - AD1934 |
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